Do you think the reason ________ he gave is believable?

　　A. for which　　　B. which　　　　C. why　　　　　 D. what

. The company          Ms King worked ten years ago has closed because of the financial crisis.

A. for which　                    B. for that                           C. that                               D. which

Do you think the reason ________ he gave is believable?

　　A. for which　　　B. which　　　　C. why　　　　　 D. what

For many cities in the world，there is no room to spread out further，　　　 New

York is an example.

A.for which　　　　 B.in which　　　 C.of which　　　 D.from which

Some biologists believe this is an ancient survival strategy, _______ a diet with 30 percent fewer calories than usual increased life span.

A. for which　　　 　　　B. to which　　 C. of which　　　 D. in which